Add spdx tags to all source files (#1510)

With notable exceptions of:

src/apps/common/win/*
src/apps/relay/telnet.*

The purpose of this change is to add the SPDX tags from
https://spdx.dev/, which is a linux foundation project, to the source
code.

This provides automated code provenance tools, which are used in setting
up software bill of materials reports, an easy time verifying that the
code license is known and no incompatibilities are present in a
codebase.

No copyright date, author, or license changes are made.

Note also that
https://github.com/coturn/coturn/commit/7e525c8e1c09c0055fb00fbcac091c4d87d19937
is the original commit for the ACME code (acme.h and acme.c) which was
then moved to acme.h and acme.c in this commit
https://github.com/coturn/coturn/commit/d4686750eee289f05e24e9fdcc99c88d4fb217f2
but neither commit indicates what license the ACME code was submitted
as.

https://github.com/coturn/coturn?tab=License-1-ov-file#readme is the
3-clause BSD license, but https://github.com/coturn/coturn/pull/672
documents that the author's intent was for the MIT license. So I've used
the SPDX tag and content of the MIT license for this change.

CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 cmake_minimum_required(VERSION 3.16)
 

src/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(coturn)
 

src/apps/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 add_subdirectory(common)
 add_subdirectory(natdiscovery)

src/apps/common/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turncommon)
 

src/apps/common/apputils.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/common/apputils.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/common/ns_turn_openssl.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/common/ns_turn_utils.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/common/ns_turn_utils.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/common/stun_buffer.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/natdiscovery/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turnutils_natdiscovery)
 

src/apps/natdiscovery/natdiscovery.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/oauth/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turnutils_oauth)
 

src/apps/oauth/oauth.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/peer/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turnutils_peer)
 

src/apps/peer/mainudpserver.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/peer/udpserver.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/peer/udpserver.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turnserver)
 

src/apps/relay/acme.c

@@ -1,8 +1,22 @@
-
 /*
+ * SPDX-License-Identifier: MIT
+ *
+ * https://opensource.org/license/mit
+ *
  * Copyright (C) 2020 Jens Elkner.  All rights reserved.
  *
- * License: MIT - see https://opensource.org/licenses/MIT
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the “Software”), to deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
 #include "acme.h"

src/apps/relay/acme.h

@@ -1,31 +1,22 @@
 /*
- * Copyright (C) 2011, 2012, 2013, 2014 Citrix Systems
+ * SPDX-License-Identifier: MIT
  *
- * All rights reserved.
+ * https://opensource.org/license/mit
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the project nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
+ * Copyright (C) 2020 Jens Elkner.  All rights reserved.
  *
- * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+ * documentation files (the “Software”), to deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
 #ifndef __TURN_ACME__

src/apps/relay/dbdrivers/dbd_mongo.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbd_mongo.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbd_mysql.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbd_mysql.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbd_pgsql.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbd_pgsql.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbd_redis.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbd_redis.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbd_sqlite.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbd_sqlite.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbdriver.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dbdrivers/dbdriver.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  * Copyright (C) 2014 Vivocha S.p.A.
  *

src/apps/relay/dtls_listener.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/dtls_listener.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/hiredis_libevent2.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/hiredis_libevent2.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/http_server.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013, 2014 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/http_server.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013, 2014 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/libtelnet.c

@@ -1,4 +1,6 @@
 /*
+ * SPDX-License-Identifier: Unknown
+ *
  * libtelnet - TELNET protocol handling library
  *
  * Sean Middleditch

src/apps/relay/libtelnet.h

@@ -1,4 +1,6 @@
 /*!
+ * SPDX-License-Identifier: Unknown
+ *
  * \brief libtelnet - TELNET protocol handling library
  *
  * SUMMARY:

src/apps/relay/mainrelay.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/mainrelay.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/netengine.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/ns_ioalib_engine_impl.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/ns_ioalib_impl.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/ns_sm.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013, 2014 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/prom_server.c

@@ -1,3 +1,37 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
+ * Copyright (C) 2020 Miquel Ortega
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
 #include "prom_server.h"
 #include "mainrelay.h"
 #include "ns_turn_utils.h"

src/apps/relay/prom_server.h

@@ -1,3 +1,36 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
+ * Copyright (C) 2020 Miquel Ortega
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
 
 #ifndef __PROM_SERVER_H__
 #define __PROM_SERVER_H__

src/apps/relay/tls_listener.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/tls_listener.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/turn_admin_server.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/turn_admin_server.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/turn_ports.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/turn_ports.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/userdb.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/relay/userdb.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/rfc5769/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turnutils_rfc5769check)
 

src/apps/rfc5769/rfc5769check.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/stunclient/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turnutils_stunclient)
 

src/apps/stunclient/stunclient.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/uclient/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turnutils_uclient)
 

src/apps/uclient/mainuclient.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.
@@ -27,7 +31,6 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
-
 #include "apputils.h"
 #include "ns_turn_utils.h"
 #include "session.h"

src/apps/uclient/session.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/uclient/startuclient.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/uclient/startuclient.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/uclient/uclient.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/apps/uclient/uclient.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/client++/TurnMsgLib.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/client/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turnclient)
 

src/client/ns_turn_ioaddr.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/client/ns_turn_ioaddr.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/client/ns_turn_msg.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/client/ns_turn_msg.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/client/ns_turn_msg_addr.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/client/ns_turn_msg_addr.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/client/ns_turn_msg_defs.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/client/ns_turn_msg_defs_experimental.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/ns_turn_defs.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/CMakeLists.txt

@@ -1,4 +1,36 @@
-# Author: Kang Lin <[email protected]>
+##
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# https://opensource.org/license/bsd-3-clause
+#
+# Copyright (C) 2021 Kang Lin <[email protected]>
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the project nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+##
 
 project(turn_server)
 

src/server/ns_turn_allocation.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/ns_turn_allocation.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/ns_turn_ioalib.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/ns_turn_khash.h

@@ -1,5 +1,9 @@
 /* The MIT License
 
+   SPDX-License-Identifier: MIT
+
+   https://opensource.org/license/mit
+
    Copyright (c) 2008, 2009, 2011 by Attractive Chaos <[email protected]>
 
    Permission is hereby granted, free of charge, to any person obtaining

src/server/ns_turn_maps.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/ns_turn_maps.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/ns_turn_maps_rtcp.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/ns_turn_maps_rtcp.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/ns_turn_server.c

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/ns_turn_server.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.

src/server/ns_turn_session.h

@@ -1,4 +1,8 @@
 /*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * https://opensource.org/license/bsd-3-clause
+ *
  * Copyright (C) 2011, 2012, 2013 Citrix Systems
  *
  * All rights reserved.